Question

sin³x+1/∞=cos²y+21° ,
where, y=60° find the value of x​

Answer 1

sin3x=3sinx-4sin^3x

sin^3x=(3sinx-sin3x)/4

intregal of this

(-3cosx+cos3x/3)/4

(cos3x-9cosx)/12

i hope this will help you

Hope helps

Answer 2

Answer:

Given, x and y are supplementary angles -(1)

and y = 60°. - (2)

So, x + y = 90° from (1)

x + 60°=90° from (2)

x = 90° - 60°

therefore, x = 30°